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United States Patent | 5,099,468 |
Suzuki ,   et al. | March 24, 1992 |
An optical information processing apparatus is so constructed that an optical head in the apparatus for recording and/or reproducing information by irradiating a light beam onto a recording medium is exchangeably attached to an apparatus main body, wherein a circuit which compensate for an offset of an electric signal which is output from the optical head, is attached to the apparatus main body so that it can be exchanged together with the optical head, thereby making unnecessary an offset adjustment after the optical head has been exchanged.
Inventors: | Suzuki; Yasuo (Tokyo, JP); Aoi; Shigeru (Kawasaki, JP) |
Assignee: | Canon Kabushiki Kaisha (Tokyo, JP) |
Appl. No.: | 713610 |
Filed: | June 11, 1991 |
Feb 08, 1988[JP] | 63-25795 |
Current U.S. Class: | 369/44.32; 369/44.14; 369/44.36 |
Intern'l Class: | G11B 007/00 |
Field of Search: | 369/44.11,44.14,44.27,44.29,44.32,44.35,44.36,53,54,55,116 360/114 |
4293944 | Oct., 1981 | Izumita et al. | 369/45. |
4607157 | Aug., 1986 | Millar et al. | 369/44. |
4707648 | Nov., 1987 | Minami | 369/44. |
4730294 | Mar., 1988 | Funada | 369/44. |
4763199 | Aug., 1988 | Suzuki | 358/280. |
4783590 | Nov., 1988 | Aol | 250/202. |